Self-study
Committee chairperson: No new course will be approved for next year's schedule unless a proposal for it has already been received either by this committee or by Dean Wilson. ████ ██████ ███ ████████ ████ ███ ███ ██████ █████████ ███ ███ ██ ███ ███ ██████ █████████ ████ ████ █████████ ███ ████████ ███ ███ ███████████ ████████ ██ ███ ████ ███████ █████ █████████ ████ █████ ███ ███████████ ███████ ████ ████ ██████████████
Summary
The stimulus can be diagrammed as follows:
Notable Valid Inferences
If the proposal for a new course was received by the committee, then that course will have a prerequisite.
If multiple new courses are proposed for next year, at least some of these proposals will be reviewed by the committee (and thus be an upper level course with a prerequisite).
19.
Which one of the following ███ ██ ████████ ████████ ██ ███ █████████████ ██████████ ███ █████
a
If there are ██ ███ ███████████ ███████ ████ █████ ████ █████ ████ ██ ██ ███ ███████ ████ ████ ████ ████ ██████████████
Could be false. We know that all upper level courses have prerequisites, but there could be courses that have prerequisites that aren’t upper level courses. (A) confuses the sufficient and necessary conditions in the relationship “all upper level courses will have prerequisites.”
b
If all of ███ ███ ███████ ████ ████ ███ ███████████ ████████ ████ ███ ██ ███ ███ ██████ █████████ █████████ ██ ███ █████████ ████ ████ ████ █████████
Could be false. Saying that all new courses are upper level courses doesn’t mean that all upper level course proposals that were submitted were approved. It could still be the case that some of the new course proposals submitted to the committee were rejected.
c
If there is ████ ████ ███ ███ ██████ ████ █████ ██ █████ ███ ██ ████ ████ ██ █ ██████ ████ ███ █ █████████████
Must be true. Dean Wilson received only one proposal, so if more than one proposal was approved, then we know at least one of the proposals was received by the committee, and all proposals received by the committee require prerequisites.
d
If the new ██████ ████████ ████ ████ ██████ ████████ ██ ███ ██ ███████████ ███████ ████ ███ ███████ ███████ ████ ████ ████ ████ ██████████████
Could be false. It could be the case that there are pre-existing lower level courses that don’t have prerequisites.
e
If there are ██ ███ ███████████ ███████ ████ █████ ████ ███ ███ ██████ ████████ ████ ███ █████████ ██ ████ ██████ ████ ████ ████ █████████
Could be false. If we know that no new upper level courses were approved, then the committee did not approve any new courses. However, it could still be the case that Dean Wilson received (and rejected) a proposal for an upper level course.